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Zhao, J.W.; Sun, B.-H.; Tanihata, I.; Terashima, S.; Prochazka, A.; Xu, J.Y.; Zhu, L.H.; Meng, J.; Su, J.; Zhang, K.Y.; Geng, L.S.; He, L.C.; Liu, C.Y.; Li, G.S.; Lu, C.G.; Lin, W.J.; Lin, W.P.; Liu, Z.; Ren, P.P.; Sun, Z.Y.; Wang, F.; Wang, J.; Wang, M.; Wang, S.T.; Wei, X.L.; Xu, X.D.; Zhang, J.C.; Zhang, M.X.; Zhang, X.H.
Physics letters. B, 12/2023, Volume: 847Journal Article
We present the charge-changing cross sections (CCCS) of 11−15C, 13−17N, and 15,17−18O at around 300 MeV/nucleon on a carbon target, which extends to p-shell isotopes with N<Z for the first time. The Glauber model, which considers only the proton distribution of projectile nuclei, underestimates the cross sections by more than 10%. We show that this discrepancy can be resolved by considering the contribution from the charged-particle evaporation process (CPEP) following projectile neutron removal. Using nucleon densities from the deformed relativistic Hartree-Bogoliubov theory in continuum, we investigate the isospin-dependent CPEP contribution to the CCCS for a wide range of neutron-to-proton separation energy asymmetry. Our calculations, which include the CPEP contribution, agree well with existing systematic data and reveal an “evaporation peak” at the isospin symmetric region where the neutron-to-proton separation energy is close to zero. These results suggest that analysis beyond the Glauber model is crucial for accurately determining nuclear charge radii from CCCSs.
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